package com.future.springcloud.controller;

import com.future.springcloud.entities.CommonResult;
import com.future.springcloud.entities.Payment;
import com.future.springcloud.service.PaymentService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.TimeUnit;

/**
 * 支付管理控制层
 */
@RestController
@Slf4j
public class PaymentController {
    @Resource
    private PaymentService paymentService;

    @Value("${server.port}")
    private String serverPort;

    @Resource
    private DiscoveryClient discoveryClient;


    //只传给前端CommonResult，不需要前端了解其他的组件
    @PostMapping(value = "/payment/create")
    public CommonResult create(@RequestBody Payment payment) {
        int result = paymentService.create(payment);
        log.info("*****插入结果：" + result);
        if (result > 0) {
            return new CommonResult(200, "插入数据成功", result + ",serverPort:" + serverPort);
        } else {
            return new CommonResult(444, "插入数据失败了", null);
        }
    }

    @GetMapping(value = "/payment/get/{id}")
    public CommonResult getPaymentById(@PathVariable("id") Long id) {
        Payment payment = paymentService.getPaymentById(id);
        log.info("*****插入结果：" + payment);
        if (payment != null) {
            return new CommonResult(200, "查询成功,serverPort:" + serverPort, payment);
        } else {
            return new CommonResult(444, "没有对应记录,查询ID：" + id, null);
        }
    }


    /**
     * 获取所有服务的信息
     * @return
     */
    @GetMapping("/payment/discovery")
    public Object discovery(){
        //获取当前微服务所有的服务
        List<String> services = discoveryClient.getServices();
        for(String e : services){
            log.info("******element:" + e);
        }

        //获取指定微服务的实例
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");
        for(ServiceInstance instance : instances){
            log.info(instance.getServiceId() + "\t" + instance.getHost() + "\t" + instance.getPort() + "\t" + instance.getUri());
        }

        return discoveryClient;
    }

    /**
     * 为自定义负载均衡算法提供
     * @return
     */
    @GetMapping(value = "/payment/lb")
    public String getPaymentLB() {
        return serverPort;//返回服务接口
    }


    /**
     * 模拟业务超时
     * @return
     */
    @GetMapping(value = "/payment/feign/timeout")
    public String paymentFeignTimeout()
    {
        // 业务逻辑处理正确，但是需要耗费3秒钟
        try {
            TimeUnit.SECONDS.sleep(3);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return serverPort;
    }
}